B. T.  Drew and Systma, K. J., ?The South American radiation of Lepechinia (Lamiaceae): phylogenetics, divergence times and evolution of dioecy.?, Bot J Linn Soc, vol. 171, pp. 171?190, 2013.

B. T.  Drew and Sytsma, K. J., ?Testing the Monophyly and Placement of Lepechinia in the Tribe Mentheae (Lamiaceae)?, issn: 0363-6445, vol. 36, pp. 1038?1049, 2011.